Answer the questions. 1. How do molecules behave in the gaseous state?

1. How do molecules behave in the gaseous state?

2. When was the progress in experimental techniques achieved?

3. What did Otto von Guericke invent and what did he demonstrate with his

device?

2. Give synonyms:

constant, to observe, technique, advance, instrument, continual, to watch, method,

progress, device.

3. Give antonyms:

constant, simple, dilute, early, involve, unite, dependent, individual, complex,

concentrated, independent, common, late, alternative, evolve, separate

4. Read and translate the sentences:

1. Experimental techniques dealing with gases were developed in the sixteenth and the seventeenth centuries. 2. Investigating the properties of gases E. Torricelli invented the mercurial barometer. 3. Having prepared everything for the laboratory work, the students began experimenting with chemicals. 4. Having considered the problem, we arrived at a definite conclusion. 5. The problem involved deals with inert gases. 6. The discovery of the instrument concerned belonged to Torricelli.7. The existence of rarefied atmosphere may be proved by the device concerned. 8. The question involved will be discussed later. 9. In order to determine whether a compound concerned is organic it is frequently sufficient merely to heat it.

Read and translate the text